vitePreprocess script is breaking snippet export svelte 5

[neo-noire]

Describe the bug

Just figured out that vitePreprocess({ script: true}) is breaking snippets export from <script lang="ts" module> .
I know that you do not need to use script option in svelte5, but not using it will break my enums that are defined inside <script> tags.

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-ldkwkg71?file=svelte.config.js

Logs

System Info

System:
    OS: macOS 15.4
    CPU: (10) arm64 Apple M2 Pro
    Memory: 185.34 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.10.0 - ~/.nvm/versions/node/v22.10.0/bin/node
    npm: 10.3.0 - ~/Desktop/work/project_name/node_modules/.bin/npm
    pnpm: 10.5.2 - /opt/homebrew/bin/pnpm
  Browsers:
    Chrome: 134.0.6998.166
    Edge: 134.0.3124.95
    Safari: 18.4
  npmPackages:
    svelte: ^5.19.9 => 5.20.0

Severity

annoyance

[neo-noire]

Edit so if your reprocessor script is set to true , you are not able to to export snippets from lang="ts" module.

This will not work:

<script lang="ts" module>
	export { add }
</script>

{#snippet add(props)}
	{props.a} + {props.b} = {props.a + props.b}
{/snippet}

But this will work:

<script module>
	export { add }
</script>

So there's some issue how it preprocess ts scripts.